Why would you want money made out of valueless metals when you can have highly valuable paper? It's a well known fact American currency is backed by stacks of the world's finest paper stored in Fort Knox.

Fact of the matter isn't that people hate change, it's that people hate non-quarter like change.

Every place I go to for the most part where their prices end in or relatively close to x.25/x.50/x.75 the tip jars are close to empty. Compared to places where your change gives you 39 cents or 88 cents it's crazy. I can't count the amount of times where people plan to buy things with cash in their hand, but the moment the register brings up a price with a weird combination of coins they immediately put the cash away and pay with debit/credit.